<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Visibility</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>
  <header class="page-header">
    <h1>Visibility</h1>
    <p class="lead">hidden keeps the space; display:none removes it.</p>
  </header>
  <main class="demo">
    <div class="row"><div class="cell">A</div><div class="cell v-hidden">B (visibility:hidden)</div><div class="cell">C</div></div>
  </main>
</body>
</html>